YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1895 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.90 | e | 39.96 | d | 22.17 | 13.38 | b | 33.10 | h | |
1896 | 5.92 | a | 14.43 | 13.61 | c | 41.71 | a | 59.77 | a | 65.08 | d | 68.30 | i | 65.45 | b | 53.54 | e | 40.53 | 8.80 | 13.15 | 34.72 | a | ||||
1897 | 0.78 | a | 6.13 | a | 12.72 | a | 41.38 | 54.03 | a | 61.00 | g | 69.50 | 63.34 | 63.66 | b | 46.23 | a | ----- | z | ----- | z | 39.75 | c | |||
1898 | 14.61 | 14.18 | 26.34 | 43.81 | a | 53.53 | 63.85 | d | 68.21 | g | 65.91 | b | 57.84 | b | 39.95 | c | 20.14 | h | 10.26 | b | 39.03 | b | ||||
1899 | 4.42 | a | 2.34 | 12.07 | d | ----- | z | 52.52 | a | 64.86 | b | 69.78 | a | ----- | z | 55.53 | 43.97 | b | 35.85 | 11.79 | e | 35.31 | b | |||
1900 | 14.82 | c | 0.91 | 20.72 | a | 49.43 | a | 60.10 | b | 66.93 | a | 68.76 | 73.08 | g | 56.97 | 49.23 | e | 19.70 | 14.74 | 38.39 | a | |||||
1901 | 6.31 | e | 8.09 | 26.07 | c | 46.77 | b | 59.20 | c | ----- | z | 69.19 | w | 69.02 | 55.53 | 49.10 | b | 27.50 | b | 9.03 | b | 35.66 | b | |||
1902 | 11.74 | b | 13.44 | a | 31.18 | c | 41.67 | g | 56.84 | 59.97 | 68.53 | 64.71 | 53.46 | c | 44.53 | b | 28.75 | j | 8.20 | c | 41.26 | b | ||||
1903 | 8.62 | b | 5.88 | 25.74 | b | 42.50 | a | 55.33 | a | 62.64 | a | 66.48 | 64.26 | b | 53.10 | 46.62 | b | 23.18 | 9.39 | d | 38.65 | |||||
1904 | 4.21 | e | -0.73 | a | 21.86 | b | 37.73 | b | 55.50 | a | 63.65 | f | 64.63 | d | 63.73 | 55.78 | a | 47.25 | e | 36.48 | c | 18.02 | g | 38.64 | b | |
1905 | 2.67 | d | 10.07 | 32.98 | b | 39.81 | a | 50.85 | 61.18 | 66.84 | 69.21 | 62.53 | 42.60 | a | 30.73 | b | 15.91 | d | 40.45 | |||||||
1906 | 15.25 | g | 5.15 | a | 19.65 | a | 46.28 | 51.76 | 61.95 | 67.43 | d | 66.02 | d | 62.25 | 44.20 | a | 26.12 | b | 7.69 | e | 41.68 | a | ||||
1907 | -6.07 | c | 8.76 | c | 22.90 | a | 32.93 | 45.69 | b | 62.85 | 67.69 | 64.15 | 54.05 | a | 44.50 | a | 29.70 | b | ----- | z | 38.83 | a | ||||
1908 | 14.05 | b | 13.16 | a | 22.55 | a | 44.12 | a | 52.97 | a | 62.82 | b | 69.50 | e | 65.78 | f | 65.24 | c | 47.03 | b | 35.31 | d | 18.58 | s | 42.68 | b |
1909 | 1.76 | l | 10.12 | h | 25.57 | a | 35.47 | a | 52.95 | a | 65.71 | b | 69.65 | a | 71.17 | a | 59.48 | f | 44.83 | g | 32.15 | d | 7.09 | c | 44.97 | d |
1910 | 7.52 | b | 4.00 | b | 39.80 | a | 46.47 | 50.97 | 68.45 | 72.23 | 65.32 | 57.12 | 52.00 | b | 24.93 | a | 9.45 | a | 41.52 | |||||||
1911 | -4.10 | b | 7.12 | 29.11 | 41.67 | 56.97 | 69.83 | 71.50 | 64.84 | 56.05 | 43.07 | a | 17.85 | 16.25 | a | 39.18 | ||||||||||
1912 | -10.18 | a | 12.38 | a | 20.60 | a | 45.34 | a | 56.74 | 63.68 | 69.30 | a | 65.03 | 54.25 | 46.92 | a | 33.12 | a | 15.40 | b | 39.38 | |||||
1913 | 0.41 | b | 4.70 | 21.26 | 46.72 | 52.34 | 68.03 | 68.13 | 69.84 | 58.24 | a | 40.60 | 33.78 | 23.60 | 40.64 | |||||||||||
1914 | 14.17 | a | 0.46 | 29.39 | d | 40.80 | 58.11 | 64.17 | 72.84 | 66.26 | b | 59.25 | 50.73 | ----- | z | ----- | z | 45.62 | b | |||||||
1915 | 0.47 | l | 15.71 | g | 25.15 | 50.48 | a | 51.18 | 58.02 | 63.95 | 64.69 | 54.96 | e | 45.52 | 29.15 | 15.29 | 45.84 | b | ||||||||
1916 | -2.60 | 5.38 | 18.76 | b | 39.39 | b | 50.27 | 58.45 | 74.74 | 67.46 | g | 55.23 | 40.10 | a | 29.32 | 5.40 | e | 34.04 | a | |||||||
1917 | -1.10 | -2.54 | a | 22.94 | 38.25 | 52.27 | 59.22 | a | 71.05 | 65.65 | 55.90 | 34.20 | a | 34.47 | 2.27 | c | 36.05 | |||||||||
1918 | -1.47 | 10.07 | a | 34.13 | 40.92 | 50.03 | b | 61.46 | d | 65.87 | 68.77 | 53.82 | 48.12 | a | 32.95 | 18.74 | 40.28 | |||||||||
1919 | 15.52 | a | 9.52 | a | 21.00 | 41.67 | 55.94 | 68.07 | b | 71.36 | b | 68.03 | 61.02 | a | 37.06 | d | 14.52 | b | 6.06 | 39.15 | ||||||
1920 | 2.40 | a | 10.69 | 26.62 | a | 34.40 | d | 53.65 | a | 61.66 | a | 67.66 | 67.87 | 60.37 | 51.53 | 27.88 | 16.10 | b | 40.07 | |||||||
1921 | 14.55 | b | 20.07 | 29.05 | 45.92 | 55.87 | 68.25 | 72.26 | b | 66.39 | 58.90 | 47.87 | a | 22.18 | 16.37 | a | 43.14 | |||||||||
1922 | 5.97 | b | 0.57 | a | 28.22 | a | 41.69 | a | 59.00 | 65.37 | 66.21 | 70.63 | 60.38 | 46.47 | 32.91 | b | 7.50 | 40.41 | ||||||||
1923 | 10.24 | 4.37 | b | 16.48 | b | 38.40 | 52.05 | c | 67.37 | 70.73 | a | 62.98 | 59.67 | 44.74 | 33.36 | b | 20.28 | b | 40.06 | |||||||
1924 | -2.37 | e | 16.89 | a | 24.90 | 40.33 | 46.31 | 58.85 | 63.65 | 65.95 | 55.17 | 50.89 | 25.77 | f | -2.16 | f | 42.06 | b | ||||||||
1925 | 1.48 | b | 13.61 | e | 26.10 | 47.17 | 50.82 | 60.42 | 66.44 | 68.23 | 59.62 | 33.32 | 26.16 | b | 13.15 | 38.88 | ||||||||||
1926 | 12.63 | 19.29 | b | 25.30 | a | 41.07 | 59.35 | a | 59.82 | 69.16 | 64.97 | a | 53.17 | 42.26 | 20.42 | 8.10 | 39.63 | |||||||||
1927 | 8.07 | b | 12.18 | 29.32 | a | 41.40 | a | 49.66 | 62.50 | 66.03 | 63.89 | 59.14 | a | 48.00 | 23.00 | c | -0.08 | 38.59 | ||||||||
1928 | 12.74 | b | 17.60 | d | 25.63 | a | 35.37 | 58.73 | a | 59.90 | 68.32 | 65.69 | 53.10 | a | 45.67 | a | 29.69 | d | 23.81 | d | 41.36 | |||||
1929 | -8.16 | 0.52 | b | 29.47 | 42.92 | 50.23 | 62.52 | 70.98 | 69.29 | 55.07 | a | 46.85 | 23.93 | b | 12.94 | f | 40.33 | a | ||||||||
1930 | 0.05 | 22.05 | 23.55 | 45.70 | 54.24 | 64.70 | 72.34 | 71.66 | 57.45 | a | 43.78 | a | 33.20 | 20.83 | g | 44.43 | a | |||||||||
1931 | 19.43 | a | 28.68 | 28.77 | 44.02 | 53.90 | a | 67.57 | 70.76 | 66.42 | 62.35 | 51.13 | 36.62 | 19.39 | 45.75 | |||||||||||
1932 | 12.74 | 15.98 | 21.85 | 43.22 | 57.98 | 66.35 | 68.37 | a | 69.73 | 57.47 | 41.31 | 21.89 | b | 13.08 | 40.83 | |||||||||||
1933 | 10.00 | b | 7.54 | 35.52 | k | 29.64 | e | 55.98 | 71.25 | 70.56 | 67.81 | 62.17 | 40.87 | 25.19 | a | 5.86 | b | 40.62 | a | |||||||
1934 | 10.75 | c | 13.63 | b | 23.42 | a | 41.03 | 64.63 | a | 65.88 | 72.40 | b | 67.19 | 54.05 | 49.18 | a | 35.80 | c | 10.52 | a | 42.37 | |||||
1935 | -0.88 | c | 22.92 | b | 26.66 | 38.58 | 51.93 | a | 63.25 | 78.92 | 67.48 | a | 56.45 | 46.73 | 14.07 | b | 11.03 | b | 39.76 | |||||||
1936 | -15.65 | a | -13.45 | 24.03 | 36.62 | a | 63.84 | 64.15 | 82.50 | a | 68.23 | a | 61.17 | 36.70 | c | 21.72 | 14.69 | 37.05 | ||||||||
1937 | -7.95 | 5.11 | a | 23.56 | 39.57 | 58.00 | a | 65.95 | 75.63 | 78.18 | 58.45 | 35.57 | a | 27.88 | b | 2.58 | a | 38.54 | ||||||||
1938 | 7.76 | 4.84 | ----- | z | 32.79 | w | 50.87 | 65.67 | a | ----- | z | ----- | z | 65.70 | y | 50.79 | ----- | z | ----- | z | 35.99 | g | ||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.15 | 71.90 | 60.92 | 43.68 | 36.38 | 27.98 | 52.33 | f | ||||||
1940 | 5.50 | a | 17.09 | 22.72 | b | 41.12 | 55.16 | 63.80 | 72.81 | 67.11 | 63.73 | 51.94 | 26.35 | c | 19.34 | 42.22 | ||||||||||
1941 | 11.03 | a | 12.24 | a | 26.32 | a | 47.53 | 61.02 | 67.65 | 72.74 | 69.81 | 59.00 | 45.82 | 31.66 | b | 22.88 | a | 43.98 | ||||||||
1942 | 19.58 | a | 14.38 | 33.98 | 48.52 | 53.36 | b | 62.68 | 68.79 | 69.03 | ----- | z | 58.15 | r | ----- | z | 9.36 | b | 42.19 | c | ||||||
1943 | ----- | z | ----- | z | 18.91 | d | 46.98 | a | 52.63 | 64.63 | c | 74.20 | a | 70.32 | 57.17 | 48.90 | a | 30.20 | 22.15 | 48.61 | b | |||||
1944 | 22.82 | 14.96 | d | 21.56 | d | 41.89 | c | 57.91 | d | 65.44 | c | 68.27 | a | 68.57 | b | 57.59 | g | 50.04 | c | 33.41 | b | 17.25 | a | 42.01 | a | |
1945 | 13.21 | e | 15.86 | c | 36.16 | b | ----- | z | ----- | z | ----- | z | 68.42 | a | 68.16 | 57.95 | a | 46.03 | a | 26.32 | 8.16 | b | 37.81 | c | ||
1946 | 8.36 | b | 7.15 | e | 37.50 | ----- | z | 70.17 | y | 67.16 | k | 72.13 | a | 66.63 | 57.23 | 43.48 | 28.19 | a | 13.27 | 37.11 | c | |||||
1947 | 17.48 | 10.81 | a | 25.33 | a | 40.37 | 51.56 | 61.42 | 72.16 | 75.39 | 58.80 | ----- | z | ----- | z | ----- | z | 45.93 | c | |||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.32 | 66.03 | 48.50 | b | ----- | z | ----- | z | 61.95 | i | ||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.26 | 57.10 | 47.21 | 35.92 | 11.23 | 44.74 | g | |||||
1950 | -7.65 | a | 8.14 | 21.63 | a | 34.38 | 50.98 | 64.93 | 67.13 | 64.50 | 59.63 | 48.29 | 23.87 | 8.03 | 36.99 | |||||||||||
1951 | 2.97 | 13.59 | 17.55 | 41.17 | 59.40 | 61.03 | 68.65 | 65.29 | 55.62 | 44.47 | 22.02 | 7.34 | 38.26 | |||||||||||||
1952 | 1.73 | 17.48 | 22.06 | 48.42 | 57.62 | b | 67.90 | 69.85 | 68.13 | 63.20 | 43.44 | 32.18 | 18.73 | 42.56 | ||||||||||||
1953 | 12.98 | a | 19.20 | 28.73 | 39.15 | 54.85 | 65.07 | 68.91 | c | 71.37 | 59.17 | 53.95 | 35.37 | 16.03 | 43.73 | |||||||||||
1954 | -0.63 | 28.57 | a | 26.15 | 42.62 | 51.34 | 64.64 | b | 70.97 | 68.29 | 57.52 | 46.32 | c | 35.62 | a | 21.00 | 42.70 | |||||||||
1955 | 10.18 | 6.91 | 18.40 | 51.20 | 61.39 | 64.88 | 73.62 | a | 72.21 | 59.32 | 49.18 | 19.18 | 5.22 | a | 40.97 | |||||||||||
1956 | 6.94 | 6.55 | 20.03 | 36.02 | 54.98 | 70.22 | 68.05 | c | 68.18 | 56.17 | 51.73 | 31.25 | 18.35 | a | 40.71 | |||||||||||
1957 | 4.05 | c | 12.98 | a | 27.63 | 42.58 | 56.05 | 63.22 | 74.56 | e | 68.21 | 56.32 | 46.63 | 30.14 | a | 22.04 | c | 42.03 | ||||||||
1958 | 17.87 | a | 13.36 | 30.32 | 45.13 | 58.97 | 60.00 | 66.44 | 69.32 | c | 59.57 | 49.23 | a | 32.24 | c | 11.52 | 42.83 | |||||||||
1959 | 3.50 | b | 11.12 | 33.40 | 44.15 | c | 56.61 | c | 68.80 | 71.50 | 72.23 | a | 59.53 | 41.48 | 21.58 | 26.97 | 42.57 | |||||||||
1960 | 8.48 | 12.57 | 18.27 | 42.76 | c | 56.98 | k | 63.93 | a | 70.71 | 70.58 | 63.43 | g | 48.12 | b | 30.34 | a | 9.57 | b | 37.53 | b | |||||
1961 | 8.22 | a | 18.07 | h | 32.96 | c | 38.48 | a | 53.76 | b | 68.62 | 70.12 | b | 72.82 | c | 56.90 | 49.37 | d | 30.83 | 9.13 | 44.66 | a | ||||
1962 | 3.95 | c | 5.71 | b | 22.57 | a | 39.95 | 56.03 | 64.55 | 67.77 | 70.73 | 57.30 | 50.45 | 34.10 | 18.50 | 40.97 | ||||||||||
1963 | 3.66 | 12.00 | 34.07 | a | 44.88 | 55.23 | 68.45 | 71.95 | 70.58 | 62.18 | 57.13 | 34.55 | a | 8.05 | 43.56 | |||||||||||
1964 | 14.81 | 20.71 | 21.16 | 45.88 | 59.37 | 64.41 | a | 73.03 | 66.23 | 56.80 | 46.98 | 30.98 | a | 3.91 | b | 42.02 | ||||||||||
1965 | 0.16 | 8.20 | 18.81 | e | 42.05 | 55.82 | 64.10 | 67.71 | 67.42 | 49.67 | 49.06 | 28.12 | 20.55 | 39.31 | ||||||||||||
1966 | -5.23 | 6.91 | a | 30.48 | 38.13 | 53.39 | 65.97 | 72.79 | 66.87 | 59.63 | 46.66 | 24.25 | 12.69 | 39.38 | ||||||||||||
1967 | 9.66 | 6.66 | 29.39 | 39.58 | 50.48 | 63.23 | 69.18 | 67.76 | 61.13 | 45.74 | 29.85 | 15.50 | 40.68 | |||||||||||||
1968 | 7.73 | 10.64 | a | 35.08 | 44.22 | 52.68 | a | 64.28 | 69.53 | 68.68 | 59.62 | 46.42 | 30.78 | 9.08 | 41.56 | |||||||||||
1969 | -1.35 | a | 13.45 | 17.42 | 45.40 | 57.42 | 59.42 | 69.68 | 73.13 | 60.95 | 41.90 | a | 32.22 | 15.55 | 40.43 | |||||||||||
1970 | 1.66 | 12.62 | 19.62 | a | 41.17 | 53.89 | 70.20 | 73.24 | 70.37 | 61.07 | 46.71 | 28.32 | 10.85 | 40.81 | ||||||||||||
1971 | 0.65 | 12.84 | 27.79 | 46.38 | 54.69 | 67.98 | 66.45 | 68.52 | 61.88 | e | 48.79 | 29.28 | 11.55 | 41.40 | ||||||||||||
1972 | 4.05 | a | 5.80 | a | 25.39 | 40.85 | 59.87 | 66.52 | 67.89 | 69.97 | 57.48 | 44.60 | 27.67 | 4.37 | 39.54 | |||||||||||
1973 | 13.03 | 17.93 | 36.47 | 44.08 | 57.18 | 66.25 | 69.19 | 72.45 | 57.08 | 51.87 | 25.86 | a | 8.02 | h | 46.49 | a | ||||||||||
1974 | 1.74 | 9.84 | 21.90 | 42.87 | 52.02 | a | 65.08 | 74.56 | 63.82 | 54.62 | 47.32 | 29.52 | 20.21 | 40.29 | ||||||||||||
1975 | 10.58 | 8.59 | a | 22.41 | i | 34.36 | a | 56.08 | 62.80 | 71.82 | 67.68 | 56.80 | 49.45 | 32.22 | 16.44 | g | 45.04 | b | ||||||||
1976 | 9.19 | 23.43 | 24.47 | 47.48 | 57.48 | 68.48 | a | 73.45 | 74.55 | 62.47 | a | 42.59 | b | 26.43 | 9.07 | b | 43.26 | |||||||||
1977 | -1.68 | 21.74 | a | 32.50 | a | 51.50 | a | 66.92 | a | 67.87 | d | 72.79 | b | 64.11 | d | ----- | z | ----- | z | ----- | z | 5.20 | f | 46.97 | d | |
1978 | ----- | z | 6.43 | a | 24.97 | ----- | z | 59.23 | a | 65.54 | c | 69.67 | d | 70.32 | 63.47 | 47.58 | a | 21.12 | e | ----- | z | 47.59 | c | |||
1979 | -6.04 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -6.04 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 5.62 | 10.82 | 25.33 | 42.19 | 55.17 | 64.57 | 70.22 | 68.24 | 58.20 | 45.98 | 28.27 | 13.06 | 40.72 | |||||||||||||
S.D. | 7.76 | 7.12 | 5.84 | 4.39 | 3.93 | 3.09 | 3.19 | 3.04 | 3.22 | 4.42 | 5.86 | 6.18 | 1.95 | |||||||||||||
SKEW | -0.23 | -0.11 | 0.18 | -0.24 | 0.33 | -0.10 | 0.79 | 0.55 | 0.11 | -0.59 | -0.84 | 0.28 | 0.04 | |||||||||||||
MAX | 22.82 | 28.68 | 39.80 | 51.50 | 66.92 | 71.25 | 82.50 | 78.18 | 66.03 | 57.13 | 36.62 | 27.98 | 45.75 | |||||||||||||
MIN | -15.65 | -13.45 | 12.07 | 29.64 | 45.69 | 58.02 | 63.65 | 62.98 | 49.67 | 33.32 | 8.80 | -0.08 | 36.05 | |||||||||||||
YRS | 76 | 76 | 77 | 74 | 77 | 75 | 77 | 78 | 78 | 80 | 74 | 69 | 48 |